Fanning-mill



` l 2 sheets-sheet i.. F. W.' B'HLERDING 8L C. H. H. SENNE.

Fanning Mill.

Pate ted Jan. 18, 1881.,

2`Shee-ts-Sheet 2. F. W. EELZERDING & C. H. H. SENNE.

Fanning (Mill.

UNITED STATES @PATENT OFFICE.

FRIEDRICH W. EHLERDING AND CHRISTOPH H. H. SENNE, OF IVAVERLY,

IOWA.

FANNlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 236,702, dated January 18, 1881. Application filed November 2S, 1879.

To all whom it may concer-n Be it known that we, FRIEDRICH VILHELM EHLERDING and CHRIST. HANs HEINRICH SENNE., of Waverly, in the county of Bremer and State ot' Iowa, have invented certain new and useful Improvements in Fanning-Mills; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The present invention relates to certain inI- provements in that class of fanning-Inills or grain-separators in which shaking` or vibrating shoes or sieves are resorted to for the purpose of removing impurities and refuse matter from the grain.

The invention consists in the construction and combination of parts, which will be hereinafter more fully described, and then setforth 'in the claims.

In the accompanying; drawings, forming part of this specification, Figure l is'a side elevation of the mill, representing more particularly the devices for operating the top and bottom sieves. Fig. 2 is a side elevation, showing the gearing for operating the fan. Fig. 3 is a longitudinal section of the mill. Figxfiis an end view thereof. Fig. 5 is a detail view of the upper sieve and operating devices.

The rotary fan or blowerA is preferably constructed of six radial arms and wings or blades, and is housed in a casing, B, which is detachably connected with the frame-work of the mill. One end of the fan-shaft carries a pinion, C, which meshes into a spur-wheel, D, fixed on a short shaft, E. A hand-crank or belt-pulley on this latter shaft serves as the medium for communicating motion to the fanshaft.

'lhe entrance of air into the fan casing or chamber is regulated by means of slides or shutters F, properly located in respect to airinlet openings at both sides of the tan-casing.

One end of the fan-shaft, as already mentioned, carries a pinion, while the opposite end is provided with a crank, G, from which extends a longitudinal rod, H. This rod is connectcd at its front end with a short arm, I, extending from a vertical rock-shaft, J. The shaft J is stepped at top and bottom in suitable bearings on the frame-work of the mill, and is also provided with a second arm, K, extending in an opposite direction from the arml. A short rod or plate, L, connected with said arm K and extending through the mill-casing. has its inner end connected with a sieve or vibrating shoe, M. The front end of this sieve or shoe has avertical suspension-rod, m, which runs or slides on a staple-shaped guide, a, applied to the roof of the mill-casing. The rear end of the sieve is adjust-ably suspended by means of straps p, arranged one at each side of the sieve-frame, and connected with the lat ter and with turnable pins or shafts q fitted in a top cross-piece of the mill. By means ot these straps and pins the sieve can be raised and lowered, so as to change the inclination thereof', it being understood that the front suspension devices willv not interfere with this` adjustment, nor prevent the proper shaking or vibrating movement of the sieve. The front and lower end of the sieve terminates above a pocket, O, made open at the top and havinga sloping bottom or oor, which projects through the mill-casing and forms a spout, P, thereat. The object of this pocket and spout is to receive and discharge the lighter seeds forced back by the action of the fan or blower.

I In rear of the pocket O is arranged a second larger pocket or refuse-chamber, Q, which is designed to receive the trash and impurities which are larger than the grain being cleaned. This chamber Q also has a bottom sloping to the left of the mill, and formed into a spout,

R, for discharging the matters collecting in` said chamber. A vertically-sliding board, S, is arranged between the two pockets P Q, as shown in Fig. 3. The object of this board is to prevent the lighter grain from being blown over into therefuse-chamber, and as said board is adjustable it can be always placed in proper relation to the sieve, whether the same be elevated or lowered.

In contradistinction to thewire-gauze screens or sieves having rectangular or oval holes, we propose to employ screen-plates having round or circular openings, as is shown in Fig. 5.

IOO

The size of these openings varies according to the nature of the grain to be cleaned.

A feeding-hopper, T, having a sloping bottom, discharge aperture, and slide, t, is arranged above the upper screen and serves to deliver the grain thereto.

rIhe blast of air produced by the rotary fan acts upon the grain and causes the separa-tion of the lighter kinds of grain in the manner already described. rIhe grain passing through the screen falls upon a guideboard, U, which delivers it to the bottom screen or shoe, V. A movable board or slide, IY, arranged below the front end of the screen M, serves to regulate the force of the blast actin gupon the grain on the upper sieve. This is accomplished by shiftin g the slide forward or backward, as may be desired.

The lower sieve or shoe is suspended at its rear end in the same manner as the front end of the upper sieve, and a vibratory or shaking motion is given to it by means of a strap, X, and spring Y. The strap X is connected with the longitudinal connecting-rod II, and from thence it passes around a guide roller, Z, through an opening in the bottom of the millcasing, where it is connected with the lower sieve or shoe. A short strap connected with the opposite side of said sieve passes through an opening in the mill-casing, and is connected (Shown in with a spring tongue or plate, Y.

Fig. 2.) It will be apparent that the strap X is so connected with the operating devices of the upper shoe as will cause the lower shoe to receive a shaking movement simultaneously therewith, the strap and connecting devices moving the lower screen to the left and the spring Y returning the same to the right.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

I. The combination of the vertical rock-shaft J, having top arm, K, and centrally-located arm, I, the pitman H, strap X, and roller Z, with the top and bottom shaking screens, M V, the crank-shaft ofthe fan, the springtongue Y, and the mill-casing, all constructed and relatively arranged as herein set forth, to operate in the manner described.

2. The combination of the vertically-adjustable slide or gate S,the pocketsQ, O, arranged on opposite sides thereof', with the shaking screen M and fan A, as and for the purpose set forth.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in presence of two witnesses.

FRIEDRICH WILHELH EHLERDING. CHRISTOPH HANS HEINRICH SENNE. Witnesses Gus'r. v. PoEKnLz, HENRY 'KAsnME1En- 

